﻿/*******************************************************
Copyright © 2009 Active Technologies Group, Inc. (ATGi)

Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following
conditions:

The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.
*******************************************************/

using System;
using ATGi.CS.Facebook.Data;
using CommunityServer.Components;
using CommunityServer.Controls;

namespace ATGi.CS.Facebook.Controls
{
    public class UserHasAssociatedFacebookAccountCondition : ConditionBase
    {
        private User _dataSource = null;
        public virtual object DataSource
        {
            get
            {
                if (_dataSource == null)
                {
                    if (this.UseAccessingUser)
                        _dataSource = CSControlUtility.Instance().GetCurrentCSContext(this.Page).User;
                    else
                        _dataSource = CSControlUtility.Instance().GetCurrentUser(this);
                }

                return _dataSource;
            }
            set
            {
                if (value is User)
                    _dataSource = (User)value;
                else
                    throw new InvalidCastException("DataSource must be a valid User object");
            }
        }

        public override ConditionProcessEvent ProcessDuring
        {
            get { return UseAccessingUser ? ConditionProcessEvent.Load : ConditionProcessEvent.DataBind; }
        }

        /// <summary>
        /// When true, the current user accessing the page will be used for processing instead of the current contextual user
        /// </summary>
        public bool UseAccessingUser
        {
            get
            {
                object val = ViewState["UseAccessingUser"];
                return val == null ? false : (bool)val;
            }
            set
            {
                ViewState["UseAccessingUser"] = value;
            }
        }

        public override bool Result
        {
            get 
            {
                if (this.DataSource == null)
                    return false;
                else
                    return _dataSource.IsFacebookUser();
            }
        }
    }
}
